Process of making cohering masses.



lint;

DANDRIDGE H. BIBB, OF NEW YORK, N. Y., ASSIGNOR '10 CUNTINENTAL PROCESSCORPORATION, OF EBIAROLIJEF VILLAGE, NEW

YORK.

YORK, -A CORPORATION OF NEW PROCESS OF MAKING COHERING MASSES.

No Drawing. Application filed-May 9, 1914, Serial No. 837,558. RenewedMarch 10, 1915.

To all whom it may concern;

Be it known that I, DANDRIDGE H. BIBB,

a citizen of the United States, residing at New York city, county of NewYork, State of New York, have invented certain new and usefulImprovements in Processes of Making'Cohering Masses, of which thefollowing is a full, clear, and exact description.

My invention relates to a new and im proved process of making coheringmasses, and has for its object to produce a durable mass consisting ofgranular material held together by a water resistant binder producedfrom the concentrated liquor being commonly known as waste sulfiteliquor, the

durable masses when so produced from materials such as ores or the likebeingsuitable for use in a blast furnace.

It is a generally accepted proposition that masses or briquets in orderto meet the conditions imposed upon them commercially, should havestrength, abrasive resistance,

and be substantially resistant to the action of water,strength forhandling during transportation, to resist disintegration While they aredropping through the blast fur; nace until such time as they reach themelt ing zone, abrasion resistance so as to re sist abrasion duringtransportation, water resistant so as to Withstand moisture while beingtransported or in storage.

It is a well known fact that the residue re sulting from the evaporationof sulfite waste liquor is soluble, rendering it unfit Without treatmentfor the purposes of binder for briquets to meet the conditions imposed.Many attempts have been made to accomplish this result, some by theaddition of foreign substances to the binder, and some by the agency ofheat. So far-these attempts have not proved commercially successful, theforeign substance after being used 'not rendering the masses or briquetsinsoluble, and the heat heretofore used coking the masses or briquets,thereby rendering them unsuitable to withstand abrasion and the cokedpart of the briquet disintegrating.

I have found in actual practice that there is a critical point when thesulfite liquor residue referred to is used as a binder and when heated.to that critical point in a mass or briquet, andv the heat sustained atthat critical point for a given duration of time,

Specification of Letters Patent.

Patented 2 8, i915...

Serial No. 13,402.

the resultant product has the strength re quired, will resist abrasionand is water resistant.

The following is a description of my in vention. In carrying out myinvention ll make use of Waste liquor obtained in the .sulfite processof paper making that has copper or other ores, fine dust, pyritescinder, etc.

In making a briquet by my process I take an amount of granular materialand a sulficient amount of sulfite process Waste liquor to bind theparticles together. I have found that in order to make a briquet of fiuedust an amount of the waste sulfite liquor evaporated to a viscosity of30 to 32 Baum equal to from six (6) to eight (8) per cent. by weight ofthe flue dust, is sutlicient. I thoroughly mix the flue dust with thesulfite liquor in any suitable mixing apparatus, and then press portionsthereof one after another into the shape of briquets. I

may press fifty portions, if desired, at one operation. These briquetsare at this stage more or less fragile and are not water .resistant. Ihave discovered that by subjecting them to the proper heat for theproper given duration of time, they become substan tially' waterresistant, very strong and will resist abrasion. I subject them to heatat a temperature of about six hundred degrees (600) Fahrenheit, for aperiod of about twenty (20) minutes. verting the residue of the .sulfiteliquor into a 'non-coked water resistant substance and produces acompletely formed and hardened water resistant briquet of flue dustbound together throughout by water resistant residue of sulfite processwaste liquor, which briquet uill stand a hard abrasion test.

In briqueting other granular-material I proceed in a similar manner,varying the proportions of the binder from four (4:) per cent. to ten(10) per cent. by Weight accord ing to the character of the granular subIn practice This results in conart, my invention permits ofmodifications without departing from the spirit thereof or p the scopeof the appended claims.

' about thirty degrees (30) Baum,

What I claim is 1. In the process of producing a cohering mass, themixing granular material with sulfite process waste liquor subjectingthe mixture to pressure so, as to form a .cohering mass and convertingthe sulfite process waste liquor into a non-coke Water resistantsubstance by the application of heat.

2. In the process of producing a cohering mass, the improvement whichconsists in mixing granular material with sulfite process wasteliquorevaporated to a viscosity of subjecting the mixture to ressure so as toform a cohering mass and converting the sulfite process waste liquorinto a non-coked water resistant substance by theapplication of heat.

3. In the process of producing a cohering mass, the improvement whichconsists in mixing granular material with sulfite process waste liquorsubjecting the mixture to pressure so as to form a cohering mass andconverting the sulfite process waste liquor improvement which consistsin into a non-coked water resistant substance by the application of heatabout six hundred degrees (600) Fahrenheit.

4. In the process of producing a cohering mass, the improvement whichconsists in mixing granular material with sulfite process waste liquor,subjecting the mixture to pressure so as to form a c'ohering mass andartificially heating the mass thus formed bV a heat of about six hundreddegrees (600) Fahrenheit, and sustaining said heat for about twenty (20)minutes.

5. In the process of producing a cohering mass, the improvement whichconsists in mixing granular material with sulfite process waste liquorhaving a viscosity of about thirty degrees Baum, sub ecting the mixtureto pressure so as to form a cohering mass and artificially heating themass thus formed by a heat of about six hundred degrees (600) Fahrenheitand sustaining said heat for a period of about twenty (20) minutes.

DANDRIDGE Ii. BIBB.

lVitnesses:

' H. B. BRowNELL,

HENDERSON F. HILL.

